Elsevier

Nuclear Physics A

Volume 484, Issue 2, 18 July 1988, Pages 264-274
Nuclear Physics A

New neutron-deficient isotopes 83Nb and 85Nb

https://doi.org/10.1016/0375-9474(88)90072-3Get rights and content

Abstract

New neutron-deficient isotopes of 83,85Nb were identified with the aid of results of the in-beam spectroscopic studies of 83,85Zr. The activities were generated by the 58Ni(28Si, p2n)83Nb, 60Ni(28Si, p2n)85Nb and 58Ni(32S, αp)85Nb, reactions, and the radiations were measured by means of βγ-coincidence. Then the half-lives of 83Nb and 85Nb were found to be 4.1 ± 0.3 and 20.9 ± 0.7 sec, and the QEC values were determined to be 7.5 ± 0.3 and 6.0 ± 0.2 MeV for 83Nb and 85Nb, respectively, which are noticeably lower than predicted values from mass formulae.

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